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            <article class="content wrap" id="_content" data-uid="SpiceSharp.Algebra.ISparseMatrix`1">



  <h1 id="SpiceSharp_Algebra_ISparseMatrix_1" data-uid="SpiceSharp.Algebra.ISparseMatrix`1" class="text-break">Interface ISparseMatrix&lt;T&gt;</h1>
  <div class="markdown level0 summary"><p>Describes a sparse matrix that return elements that have links to neighboring non-zero elements.</p>
</div>
  <div class="markdown level0 conceptual"></div>
  <div class="inheritedMembers">
    <h5>Inherited Members</h5>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_Size">IMatrix&lt;T&gt;.Size</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_Item_System_Int32_System_Int32_">IMatrix&lt;T&gt;.this[int, int]</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_Item_SpiceSharp_Algebra_MatrixLocation_">IMatrix&lt;T&gt;.this[MatrixLocation]</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_SwapRows_System_Int32_System_Int32_">IMatrix&lt;T&gt;.SwapRows(int, int)</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_SwapColumns_System_Int32_System_Int32_">IMatrix&lt;T&gt;.SwapColumns(int, int)</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_Reset">IMatrix&lt;T&gt;.Reset()</a>
    </div>
    <div>
      <a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html#SpiceSharp_Algebra_IMatrix_1_Clear">IMatrix&lt;T&gt;.Clear()</a>
    </div>
  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="SpiceSharp.html">SpiceSharp</a>.<a class="xref" href="SpiceSharp.Algebra.html">Algebra</a></h6>
  <h6><strong>Assembly</strong>: SpiceSharp.dll</h6>
  <h5 id="SpiceSharp_Algebra_ISparseMatrix_1_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public interface ISparseMatrix&lt;T&gt; : IMatrix&lt;T&gt;</code></pre>
  </div>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">T</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h3 id="properties">Properties
</h3>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_ElementCount_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.ElementCount*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_ElementCount" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.ElementCount">ElementCount</h4>
  <div class="markdown level1 summary"><p>Gets the number of elements in the matrix.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">int ElementCount { get; }</code></pre>
  </div>
  <h5 class="propertyValue">Property Value</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><p>The element count.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="methods">Methods
</h3>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_FindDiagonalElement_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.FindDiagonalElement*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_FindDiagonalElement_System_Int32_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.FindDiagonalElement(System.Int32)">FindDiagonalElement(int)</h4>
  <div class="markdown level1 summary"><p>Finds the <a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement&lt;T&gt;</a> on the diagonal.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">ISparseMatrixElement&lt;T&gt; FindDiagonalElement(int index)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">index</span></td>
        <td><p>The index.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement</a>&lt;T&gt;</td>
        <td><p>The matrix element if it exists; otherwise <code>null</code>.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="exceptions">Exceptions</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Condition</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception">ArgumentOutOfRangeException</a></td>
        <td><p>Thrown if <code class="paramref">index</code> is negative.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_FindElement_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.FindElement*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_FindElement_SpiceSharp_Algebra_MatrixLocation_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.FindElement(SpiceSharp.Algebra.MatrixLocation)">FindElement(MatrixLocation)</h4>
  <div class="markdown level1 summary"><p>Finds a pointer to the matrix element at the specified row and column. If
the element doesn't exist, <code>null</code> is returned.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">Element&lt;T&gt; FindElement(MatrixLocation location)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.MatrixLocation.html">MatrixLocation</a></td>
        <td><span class="parametername">location</span></td>
        <td><p>The matrix location.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.Element-1.html">Element</a>&lt;T&gt;</td>
        <td><p>The matrix element if it exists; otherwise <code>null</code>.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_GetElement_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetElement*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_GetElement_SpiceSharp_Algebra_MatrixLocation_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetElement(SpiceSharp.Algebra.MatrixLocation)">GetElement(MatrixLocation)</h4>
  <div class="markdown level1 summary"><p>Gets a pointer to the matrix element at the specified row and column. If
the element doesn't exist, it is created.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">Element&lt;T&gt; GetElement(MatrixLocation location)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.MatrixLocation.html">MatrixLocation</a></td>
        <td><span class="parametername">location</span></td>
        <td><p>The matrix location.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.Element-1.html">Element</a>&lt;T&gt;</td>
        <td><p>The matrix element.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_GetFirstInColumn_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetFirstInColumn*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_GetFirstInColumn_System_Int32_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetFirstInColumn(System.Int32)">GetFirstInColumn(int)</h4>
  <div class="markdown level1 summary"><p>Gets the first non-default <a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement&lt;T&gt;</a> in the specified column.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">ISparseMatrixElement&lt;T&gt; GetFirstInColumn(int column)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">column</span></td>
        <td><p>The column index.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement</a>&lt;T&gt;</td>
        <td><p>The matrix element.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="exceptions">Exceptions</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Condition</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception">ArgumentOutOfRangeException</a></td>
        <td><p>Thrown if <code class="paramref">column</code> is negative.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_GetFirstInRow_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetFirstInRow*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_GetFirstInRow_System_Int32_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetFirstInRow(System.Int32)">GetFirstInRow(int)</h4>
  <div class="markdown level1 summary"><p>Gets the first non-default <a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement&lt;T&gt;</a> in the specified row.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">ISparseMatrixElement&lt;T&gt; GetFirstInRow(int row)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">row</span></td>
        <td><p>The row index.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement</a>&lt;T&gt;</td>
        <td><p>The matrix element.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="exceptions">Exceptions</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Condition</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception">ArgumentOutOfRangeException</a></td>
        <td><p>Thrown if <code class="paramref">row</code> is negative.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_GetLastInColumn_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetLastInColumn*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_GetLastInColumn_System_Int32_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetLastInColumn(System.Int32)">GetLastInColumn(int)</h4>
  <div class="markdown level1 summary"><p>Gets the last non-default <a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement&lt;T&gt;</a> in the specified column.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">ISparseMatrixElement&lt;T&gt; GetLastInColumn(int column)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">column</span></td>
        <td><p>The column index.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement</a>&lt;T&gt;</td>
        <td><p>The matrix element.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="exceptions">Exceptions</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Condition</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception">ArgumentOutOfRangeException</a></td>
        <td><p>Thrown if <code class="paramref">column</code> is negative.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_GetLastInRow_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetLastInRow*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_GetLastInRow_System_Int32_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.GetLastInRow(System.Int32)">GetLastInRow(int)</h4>
  <div class="markdown level1 summary"><p>Gets the last non-default <a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement&lt;T&gt;</a> in the specified row.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">ISparseMatrixElement&lt;T&gt; GetLastInRow(int row)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">row</span></td>
        <td><p>The row index.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.ISparseMatrixElement-1.html">ISparseMatrixElement</a>&lt;T&gt;</td>
        <td><p>The matrix element.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="exceptions">Exceptions</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Condition</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception">ArgumentOutOfRangeException</a></td>
        <td><p>Thrown if <code class="paramref">row</code> is negative.</p>
</td>
      </tr>
    </tbody>
  </table>
  <a id="SpiceSharp_Algebra_ISparseMatrix_1_RemoveElement_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.RemoveElement*"></a>
  <h4 id="SpiceSharp_Algebra_ISparseMatrix_1_RemoveElement_SpiceSharp_Algebra_MatrixLocation_" data-uid="SpiceSharp.Algebra.ISparseMatrix`1.RemoveElement(SpiceSharp.Algebra.MatrixLocation)">RemoveElement(MatrixLocation)</h4>
  <div class="markdown level1 summary"><p>Removes a matrix element at the specified row and column. If the element
doesn't exist, this method returns <code>false</code>.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">bool RemoveElement(MatrixLocation location)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="SpiceSharp.Algebra.MatrixLocation.html">MatrixLocation</a></td>
        <td><span class="parametername">location</span></td>
        <td><p>The location.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
        <td><p><code>true</code> if the element was removed; otherwise, <code>false</code>.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="extensionmethods">Extension Methods</h3>
  <div>
      <a class="xref" href="SpiceSharp.Utility.html#SpiceSharp_Utility_ThrowIfNull__1___0_System_String_">Utility.ThrowIfNull&lt;T&gt;(T, string)</a>
  </div>
  <h3 id="seealso">See Also</h3>
  <div class="seealso">
      <div><a class="xref" href="SpiceSharp.Algebra.IMatrix-1.html">IMatrix</a>&lt;T&gt;</div>
  </div>

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